Here is the scene of a bizarrely-behaved motorist partly crushing a cyclist who didn't move out of the way. Obviously the motorist cannot be forgiven, but, the cyclist was very stubborn too.
http://youtube.com/watch?v=R7b-Yk9IAN4
At minute 1:21 a cyclist physically blocks a car. The car driver will simply think that the cyclists are oddly-behaved and are special cases, not something to expect regularly.
http://youtube.com/watch?v=Kc9b80ROk8s
In this case, slowing down the road seems to be the objective.
http://youtube.com/watch?v=jVQpWPfRfYA
At about 3:10, some cyclists find officers' concerns amusing.
http://youtube.com/watch?v=qJju1CuGCDA
Anyway, I admit that I don't know what kind of advocacy is best.